\documentclass{article}
\usepackage[UTF8]{ctex}
\usepackage[a4paper, left = 10mm, right = 10mm, top = 15mm, bottom = 15mm]{geometry}
\usepackage{graphicx}
\usepackage{fullpage}
%\usepackage{xeCJK}
%\setCJKmainfont{Source Han Sans TWHK}
%\setmainfont{Adobe Arabic}




\title{表格demo}
\author{黄瑞霖}
\date{\today}

\begin{document}


\maketitle

\tableofcontents


\section{符号的构成}

\begin{tabular}{|c|r|r|}
    \hline
    \multirow{2}*{姓名} &
    \multicolumn{2}{c|}{成绩}\\
    \cline{2-3} 
    & 语文 & 数学\\ \hline
    王小丫 & 95 & 99 \\ \hline
\end{tabular}

\section{改变字体}


\subsection{一个子标题}





\section{插入图片}


\section{插入表格}


\section{插入公式}
\

\section{交叉引用}



\end{document}